There are three RISC OS versions that I have tested which work fine: 3.10, 3.11 and 3.19. 2.00 and 2.01 might work if you use a 15kHz capable monitor. All other versions will not work. Where did you get the ROM from? There are broken versions out there.

Put the Archimedes core onto a seperate SD card as core.rbf, switching to the Archimedes core running a different core will not work in most cases. You might need to do a reset (left MiST button) before the core starts up properly.

Really I forgot where exactly I found ROMs - I have only 3.11 (4 ROMs) and 3.71.Other - like 3.10, 3.19, 2.0 and 2.01 not - and not found over the web.

I found only RISC OS CD Collection - I was interested in until I found that shipping cots are higher that CD price...

I tried also give Archimedes to separate card and all was the same except error message - there is stop working and leave blank black screen.Also - I must to use 150407_r991 core instead 150416_r1028...

I know that Archimedes core is Beta version.Only was surprised - I found BBC OS for Acron BBC Micro - mean I correctly?

MIRKOSOFT hat geschrieben:I tried also give Archimedes to separate card and all was the same except error message - there is stop working and leave blank black screen.Also - I must to use 150407_r991 core instead 150416_r1028...

r1028 definitely works. Have you downloaded from GitHub the wrong way? How big (in bytes) is the core file?

No, 3.19 is the German version of 3.11. IIRC the english texts are not in the 3.19 ROM image - you could in theory create the "Territory UK" resources from 3.11 and use it with 3.19, but this would just consume a lot of memory compared to just using 3.11.